import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'

// 懒加载
const Home = () =>
    import ('../components/Home.vue')
const Welcome = () =>
    import ('../components/Welcome.vue')
const Users = () =>
    import ('../components/user/Users.vue')
const Rights = () =>
    import ('../components/power/Rights.vue')
const Roles = () =>
    import ('../components/power/Roles.vue')
const Cate = () =>
    import ('../components/goods/Cate.vue')
const Params = () =>
    import ('../components/goods/Params.vue')
const GoodsList = () =>
    import ('../components/goods/List.vue')
const Add = () =>
    import ('../components/goods/Add.vue')
const Order = () =>
    import ('../components/order/Order.vue')
const Report = () =>
    import ('../components/report/Report.vue')

Vue.use(VueRouter)

const routes = [{
    path: '/',
    redirect: 'login'
}, {
    path: '/login',
    component: Login
}, {
    path: '/home',
    component: Home,
    redirect: 'welcome',
    children: [{
        path: '/welcome',
        component: Welcome,
    }, {
        path: '/users',
        component: Users
    }, {
        path: '/rights',
        component: Rights
    }, {
        path: '/roles',
        component: Roles
    }, {
        path: '/categories',
        component: Cate
    }, {
        path: '/Params',
        component: Params
    }, {
        path: '/goods',
        component: GoodsList
    }, {
        path: '/goods/add',
        component: Add
    }, {
        path: '/orders',
        component: Order
    }, {
        path: '/reports',
        component: Report
    }]
}, ]

const router = new VueRouter({
    routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to表示将要访问的路径
    // from表示从哪个路径跳转过来
    // next是一个函数，表示放行
    // 直接next()表示放行  next('/login') 强制跳转到这个路径
    if (to.path === '/login') return next()
        //获取token 
    const tokenStr = window.sessionStorage.getItem('token');
    if (!tokenStr) return next('/login')
    next()
})

export default router